Umbilical cable for lunar penetrator and coiling installation method of umbilical cable

Abstract

The invention discloses an umbilical cable for a lunar penetrator and a coiling installation method of the umbilical cable, and relates to the technical field of lunar penetrators. The umbilical cable main body comprises an armor tube, an umbilical cable insulating sheath and an umbilical cable metal shielding layer, a Kevlar rope and a cable are arranged in the umbilical cable metal shielding layer, and the length of the Kevlar rope is smaller than that of the cable. When the umbilical cable main body is mounted in a coiled manner, the umbilical cable main body extending out of the penetration stage forms an inverted S-shaped back-bending section outside the joint of the penetration stage and the power stage; and meanwhile, the umbilical cable main body is also subjected to wave-shaped wire coiling on the outer wall of the power stage, and is mounted on the power stage through a fixing assembly. The invention provides an umbilical cable for a lunar penetrator and a coiling installation method of the umbilical cable, which can ensure that the umbilical cable is not damaged in a penetration process so as to carry out effective data transmission.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of moon penetrator, and particularly relates to an umbilical cord for moon penetrator and a method for installing the umbilical cord. BACKGROUND

[0002] In recent years, extraterrestrial object exploration has become a hot spot of international deep space exploration activities, and landing exploration modes include soft landing exploration mode and hard landing exploration mode. The soft landing exploration mode mainly relies on a reverse thrust engine to reduce the terminal velocity to zero to achieve soft landing. This mode has small landing impact, and can carry relatively rich functional operation tools and exploration payloads, but the system structure is complex and the engineering cost is high. The hard landing exploration mode is to impact the surface of a planet at a high speed and penetrate to a certain depth to facilitate the exploration of the regolith at a certain depth. Compared with the traditional soft landing exploration, the hard landing exploration has the characteristics of simple structure, good integrability and flexible function configuration, and is an efficient means to realize in-situ exploration of extraterrestrial objects. It will be an important development direction of future extraterrestrial object exploration missions.

[0003] The moon penetrator is a hard landing exploration mode, and its configuration is a two-stage structure composed of a penetration stage and a power stage. The penetration stage is arranged at the front and is conical, and has an exploration payload inside for performing exploration tasks after penetration. The power stage is arranged at the rear and is cylindrical, and a communication device is arranged at the tail for wireless communication. The detection data is generally transmitted through a wired umbilical cord, that is, the umbilical cord is stretched out from the inside of the penetration stage, wound on the outer wall of the power stage and enters the communication device.

[0004] However, there is no similar precedent for reference in China at present, and there is no description of similar umbilical cord configuration and winding method in the international moon penetrator projects carried out. The general umbilical cord configuration and winding method are easily damaged during penetration, and it is difficult to perform effective data transmission. SUMMARY

[0005] The first object of the present application is to provide an umbilical cord for a moon penetrator, which can significantly increase the strength of the umbilical cord and ensure that the umbilical cord is not damaged during penetration to perform effective data transmission.

[0006] The second object of the present application is to provide a winding installation method of the umbilical cord, which can increase the length margin of the umbilical cord, effectively fix and protect the umbilical cord, and further ensure that the umbilical cord is not damaged during penetration to perform effective data transmission.

[0007] The technical scheme for solving the first technical problem of the present application is: an umbilical cable for a lunar penetrator, comprising an umbilical cable main body, the umbilical cable main body comprising, in sequence from the outside to the inside along the radial direction thereof, an armor tube, an umbilical cable insulating sheath and an umbilical cable metal shielding layer, a plurality of Kevlar ropes and at least two cables being arranged in the umbilical cable metal shielding layer along the axial direction thereof, the Kevlar ropes and the cables being connected at both ends thereof to a penetrating level internal structure and a communication device respectively, and the length of the Kevlar ropes being less than the length of the cables.

[0008] As a further improvement of the present application, the cable comprises, in sequence from the outside to the inside along the radial direction thereof, a cable insulating sheath and a cable metal shielding layer.

[0009] As a further improvement of the present application, at least two wire cores are arranged in the cable metal shielding layer along the axial direction thereof.

[0010] As a further improvement of the present application, an insulating sheath is provided around each wire core.

[0011] As a further improvement of the present application, the armor tube is a stainless steel armor tube.

[0012] The technical scheme for solving the second technical problem of the present application is: a coiling installation method for an umbilical cable of a lunar penetrator, the umbilical cable main body extending from a penetrating level internally forming a reverse "S" shape bending section externally at the connection between the penetrating level and a power level; at the same time, the umbilical cable main body also coils in a wave shape on the outer wall of the power level and is installed on the outer wall of the power level through a fixing assembly.

[0013] As a further improvement of the present application, at one end of the umbilical cable main body connected to a communication device, the armor tube, the umbilical cable insulating sheath and the umbilical cable metal shielding layer need to be removed; and the cables in the umbilical cable main body are connected to the communication device, and the Kevlar ropes are fixed on the outer structure of the communication device.

[0014] As a further improvement of the present application, a circular-arc-shaped cable cover is arranged externally at one end of the umbilical cable main body connected to the communication device, the cable cover is tightly installed on the outer wall of the communication device to protect and compress the cables; and silicone rubber is poured into the inside of the cable cover to fill the gap between the outer wall of the communication device, the cables and the cable cover.

[0015] As a further improvement of the present application, the fixing assembly comprises nylon straps and metal clamps staggered along the axial direction of the power level, and the fixing assembly further comprises a polyimide adhesive tape arranged between adjacent nylon straps and metal clamps.

[0016] As a further improvement of the present application, the wave-shaped coiling of the umbilical cable main body on the outer wall of the power level needs to avoid sensitive devices on the power level and parts that are not allowed to be blocked.

[0017] Advantages Compared with the prior art, the advantages of the umbilical cable and its coil installation method for a lunar penetrator according to the present invention are as follows: The umbilical cable using this design can significantly increase the structural strength of the umbilical cable, ensuring that the cable in the umbilical cable is not damaged during penetration, so as to enable effective data transmission. The coiled installation method of the umbilical cable can increase the length margin of the umbilical cable and effectively fix and protect the umbilical cable, further ensuring that the cable in the umbilical cable is not damaged during penetration, so as to carry out effective data transmission.

[0018] The invention will become clearer from the following description, taken in conjunction with the accompanying drawings, which are used to explain embodiments of the invention. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic cross-sectional view of the umbilical cable body in this invention. Figure 2 This is a schematic diagram of the umbilical cable reel installation method in this invention; Figure 3 This is a schematic diagram illustrating the interaction between the cable cover and the cable in this invention.

[0021] The cable is categorized as follows: 1-Umbilical cable body; 2-Armor tube; 3-Umbilical cable insulating sheath; 4-Umbilical cable metal shielding layer; 5-Cable; 6-Cable insulating sheath; 7-Cable metal shielding layer; 8-Core insulating sheath; 9-Core; 10-Kevlar rope; 11-Penetration level; 12-Power level; 13-Reverse "S" shaped bend; 14-Sensitive equipment; 15-Nylon cable tie; 16-Metal clamp; 17-Polyimide tape; 18-Communication equipment; 19-Cable cover; 20-Silicone rubber. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; of course, they can also refer to a mechanical connection or an electrical connection; furthermore, they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0025] Example Specific embodiments of the present invention are as follows: Figure 1 As shown, an umbilical cable for a lunar penetrator includes an axially extending umbilical cable body 1. The umbilical cable body 1 includes an armor tube 2, an umbilical cable insulating sheath 3, and an umbilical cable metal shielding layer 4, arranged radially from the outside in. In this embodiment, the armor tube 2 is a stainless steel armor tube, which increases the structural strength of the umbilical cable body 1; the umbilical cable insulating sheath 3 provides insulation; and the umbilical cable metal shielding layer 4 provides shielding.

[0026] Meanwhile, multiple Kevlar ropes 10 and at least two cables 5 are arranged along the axial direction inside the umbilical cable metal shielding layer 4. Both ends of the Kevlar ropes 10 and cables 5 are connected to the internal structure of the penetration level 11 and the communication equipment 18, respectively, and the length of the Kevlar ropes 10 is less than the length of the cables 5. The Kevlar ropes 10 have advantages such as high rigidity, light weight, good thermal stability, and resistance to chemical corrosion. In use, a certain length of the Kevlar ropes 10 is led out from both ends and tied and fixed to the internal structure of the penetration level 11 and the external structure of the communication equipment 18, respectively. This ensures that even when the umbilical cable body 1 is under tension, the tension is borne by the Kevlar ropes 10, not the cables 5 inside the umbilical cable body 1, thereby protecting the cables 5 inside the umbilical cable body 1.

[0027] In this embodiment, the cable 5 includes a cable insulation sheath 6 and a cable metal shielding layer 7 arranged sequentially from the outside to the inside along its radial direction. The cable insulation sheath 6 provides insulation; the cable metal shielding layer 7 provides shielding. Simultaneously, at least two wire cores 9 are arranged axially within the cable metal shielding layer 7. Each wire core 9 is covered with a wire core insulation sheath 8. The wire cores 9 transmit data, and the wire core insulation sheaths 8 provide insulation.

[0028] In the laying sequence of the umbilical cable body 1, firstly, the core insulation sheath 8 is put on the outside of the core 9, then at least two cores 9 with insulation sheaths 8 are placed together, and then the cable metal shielding layer 7 and the cable insulation sheath 6 are wrapped around the outside in sequence to form a cable 5; then, at least two cables 5 and multiple Kevlar ropes 10 are placed together, and finally the umbilical cable metal shielding layer 4, the umbilical cable insulation sheath 3 and the armor tube 2 are wrapped around the outside in sequence to form the final umbilical cable body 1.

[0029] The umbilical cable body 1 with this structure can significantly increase the structural strength of the umbilical cable body 1 and ensure that the cable 5 in the umbilical cable body 1 is not damaged during penetration, so as to carry out effective data transmission.

[0030] Regarding the installation method of the umbilical cable coil, such as Figures 2-3 As shown, the umbilical cable body 1, extending from inside the penetration stage 11, forms a reverse "S"-shaped bend 13 at the connection between the penetration stage 11 and the power stage 12. This increases the length margin of the umbilical cable body 1, preventing the umbilical cable body 1 from breaking due to tension and stress caused by the separation of the two stages during penetration, thus protecting the umbilical cable body 1. Simultaneously, the umbilical cable body 1 also has a wavy coil on the outer wall of the power stage 12 and is installed on the outer wall of the power stage 12 by a fixing component, further increasing the length margin of the umbilical cable body 1 and preventing the umbilical cable from breaking due to tension and stress caused by the separation of the two stages during penetration. In this embodiment, the degree of wavy bending of the coil must take into account the turning radius of the umbilical cable body 1; it cannot be too large or too small.

[0031] In this embodiment, since the umbilical cable body 1 is armored with the armor tube 2 and has a large turning radius, at the end of the umbilical cable body 1 that is connected to the communication device 18, the armor tube 2, the umbilical cable insulation sheath 3 and the umbilical cable metal shielding layer 4 need to be removed; and the cable 5 inside the umbilical cable body 1 is connected to the communication device 18, and the Kevlar rope 10 is tied and fixed to the outer structure of the communication device 18.

[0032] Meanwhile, an arc-shaped cable cover 19 is installed on the outside of the end of the umbilical cable body 1 that connects to the communication equipment 18. The cable cover 19 is made of titanium alloy and is installed tightly against the outer wall of the communication equipment 18 to protect and compress the cable 5. When installing the cable cover 19, silicone rubber 20 is also injected into its inner side to fill the gaps between the outer wall of the communication equipment 18, the cable 5, and the cable cover 19. This further tightens the cable and prevents it from being damaged by stress.

[0033] Furthermore, regarding the specific structure of the fixing assembly: the fixing assembly includes nylon cable ties 15 and metal clamps 16 staggered along the axial direction of the power stage 12; the fixing assembly also includes polyimide tape 17 disposed between adjacent nylon cable ties 15 and metal clamps 16. In this embodiment, the routing direction of the umbilical cable body 1 located between the last fixing assembly and the communication device 18 is perpendicular to the axial direction of the power stage 12, which improves the load-bearing capacity of the nylon cable ties 15 and metal clamps 16.

[0034] It is important to note that: The wavy coiled cable of the umbilical cable body 1 on the outer wall of the power stage 12 needs to avoid sensitive equipment 14 on the power stage 12 and parts that cannot be obstructed.

[0035] Therefore, the coiled installation method of the umbilical cable can increase the length margin of the umbilical cable and effectively fix and protect the umbilical cable, further ensuring that the cable 5 in the umbilical cable is not damaged during the penetration process, so as to carry out effective data transmission.

[0036] The present invention has been described above in conjunction with the preferred embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations made in accordance with the essence of the present invention.

Claims

1. A umbilical for a lunar penetrator comprising a umbilical body (1) characterized in that, The umbilical cable body (1) comprises, in sequence from outside to inside along its radial direction, an armor tube (2), an umbilical cable insulating sheath (3), and an umbilical cable metal shielding layer (4), a plurality of Kevlar ropes (10) and at least two cables (5) are arranged in the umbilical cable metal shielding layer (4) along its axial direction, both ends of the Kevlar ropes (10) and the cables (5) are connected with an interior structure of a penetration level (11) and a communication device (18) respectively, and the length of the Kevlar ropes (10) is less than the length of the cables (5).

2. The umbilical for a lunar penetrator of claim 1, wherein, The cable (5) comprises, in sequence from outside to inside along its radial direction, a cable insulating sheath (6) and a cable metal shielding layer (7).

3. The umbilical for a lunar penetrator of claim 2, wherein, At least two wire cores (9) are arranged in the cable metal shielding layer (7) along its axial direction.

4. The umbilical for a lunar penetrator of claim 3, wherein, A wire core insulating sheath (8) is arranged outside each wire core (9).

5. The umbilical for a lunar penetrator of claim 1, wherein, The armor tube (2) is a stainless steel armor tube.

6. A method of installing a reel of umbilical cable as claimed in any one of claims 1 to 5, characterised in that, The umbilical cable body (1) extending from the interior of the penetration level (11) forms a reverse "S" shape back bending section (13) at the connection between the penetration level (11) and a power level (12); at the same time, the umbilical cable body (1) is also waved on the outer wall of the power level (12) and is installed on the outer wall of the power level (12) through a fixing assembly.

7. The method of installing a wireline of a umbilical according to claim 6, wherein, At one end of the umbilical cable body (1) connected to the communication device (18), the armor tube (2), the umbilical cable insulating sheath (3), and the umbilical cable metal shielding layer (4) are removed; the cables (5) in the umbilical cable body (1) are connected to the communication device (18), and the Kevlar ropes (10) are fixed on the outer structure of the communication device (18).

8. The method of installing a wireline of a umbilical according to claim 7, wherein, A circular-arc-shaped cable cover (19) is arranged outside one end of the umbilical cable body (1) connected to the communication device (18), the cable cover (19) is tightly installed on the outer wall of the communication device (18) to protect and compress the cables (5); and silicone rubber (20) is poured into the inside of the cable cover (19) to fill the gap between the outer wall of the communication device (18), the cables (5), and the cable cover (19).

9. The method of claim 6, wherein, The fixing assembly comprises nylon straps (15) and metal clamps (16) staggered along the axial direction of the power level (12), and further comprises a polyimide adhesive tape (17) arranged between adjacent nylon straps (15) and metal clamps (16).

10. The method of claim 6, wherein, The waved arrangement of the umbilical cable body (1) on the outer wall of the power level (12) needs to avoid sensitive devices (14) on the power level (12) and parts that are not allowed to be blocked.

Images